Depending on class of network you are planning to use. For class C you can create much more then that (and for the most case for others too).
5 bits are necessary to create up to 30 subnets.
No
Subnets allow to isolate traffic within a subnet. It is beneficial not only from security perspective but also from performance.
routers
255.255.0.0
- is A
To create 8 subnets for the IP address 192.168.1.0, you need to use subnetting. Since 8 subnets require 3 additional bits (as 2^3 = 8), you can take 3 bits from the host part of the default subnet mask (255.255.255.0 or /24). This will change the subnet mask to 255.255.255.224 (/27), allowing for 8 subnets, each with 30 usable host addresses (2^5 - 2 = 30). The resulting subnets will range from 192.168.1.0 to 192.168.1.224.
When you borrow 3 bits from the host portion of an IP address, you can create (2^3 = 8) valid subnets. However, one subnet is reserved for the network address and another for the broadcast address, leaving you with 6 usable subnets. Thus, by borrowing 3 bits, you obtain 6 valid subnets for use.
255.255.255.0
What if your company is assigned a network address of 150.50.0.0 you need to create 4 subnets all having access to the internet what is the correct subnet mask for the network
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